<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			body ul p:nth-of-type (even){
				background: #000033;
			}
		</style>
	</head>
	<body>
		<p>p1</p>
		<p>p2</p>
		<p>p3</p>
		<span>aa</span>
		<span>bb</span>
		<p>p4</p>
		<ul>
			<li><span>1i1</span></li>
			<li><span>2i2</span></li>
			<li>1i3</li>
		</ul>
	</body>
</html>
